Skiving machine



NW1, 193s, BELL 2,134,809

SKIVING MACHINE Filed Dec: 1'7, 1937 2 Sheets-Sheet l g a I 7 4 Y [EV r M //\/\/E/\/TUQ (6%. 2 @356 is W Nov, 1, 1938.

c. c. BELL 2,134,809

SKIVING MACHINE Filed Dec. 17, 1937 2 Sheets-$heet 2 FigrL mill/111',

Kaaw fl /WLWT Patented Nov. 1, 1938 UNITED STATES PATENT OFFICE SKIVING MACHINE Application December 17, 1937, Serial No. 180,414

Claims.

This invention relates to skiving machines and is herein illustrated as embodied in a machine of the Amazeen type for skiving the edges of pieces of upper leather.

In the manufacture of certain kinds of shoes it is desirable to produce on a single part of an upper two or more scarfs which differ in width or in character or in both. For example, it may be necessary to produce along the top and front of a quarter a shoulder or fold scarf, to produce along the bottom a feather edge or underlap scarf and to produce along the back a seam scarf. in such and similar cases it is desirable that the operator be able instantly to change the relative positions of the work-engaging parts of the machine so as to produce the desired scarf. A machine capable of being operated in this manner is disclosed in United States Letters Patent No. Z,Ol1,'l01, granted May 26, 1936, upon an application filed in the name of Milton H. Roske, the present invention being an improvement upon machines of this general type.

Referring to the accompanying drawings:

Fig. 1 is a front elevation of the machine in which the present invention is embodied;

Fig. 2 is a section on the line II of Fig. 1

showing more particularly the presser and edge guide and the manner in which they are mounted;

Fig. 3 is a detail in elevation showing one of the positions of the work-engaging parts, the plane of the out of the knife being indicated by a broken line;

Fig. 4 is a section of a piece of work showing the shoulder scarf which is produced when the work-engaging parts are in the positions shown in Fig. 3;

Fig. 5 is an elevation after the manner of Fig. 3 showing the work-engaging parts in the positions occupied after a treadle has been manipulated to adjust the feed roll angularly and to adjust the presser and edge guide to the left; and

Fig. 6 is a section of a piece of work showing the seam scarf which is produced when the work engaging parts are in the positions shown in Fig. 5.

The illustrated machine is similar in many respects to the machine disclosed in the patent which has been identified above. The present machine, like that of the patent, comprises a rotary disk knife '9, a rotary feed roll H and a rotary feed disk I3. The knife is manually adjustable substantially vertically toward and from the feed roll. The feed disk presses a portion of the work against a reduced end of the feed roll and aids in feeding the work. The feed roll shaft is rotatable in a block which is adjustable horizontally on a support W, said support being angularly adjustable in a curved guide member t8 the center of curvature of which 5 lies in a horizontal axis which passes through an element on the upper surface of the feed roll. It will be noted that by adjusting the block l5 to the right or left, the position of this horizontal axis with respect to the feed roll may be changed. 10 The block l5 carries a superstructure by which the feed disk is carried so that angular adjustment of the feed roll support El adjusts the feed disk. The feed disk and feed roll thus preserve at all times their relative positions. The curved l5 guide member in which the feed roll support is adjusted is located at the outer end of a large arm I9, said arm being adjustable in a horizontal path about the axis of a vertical stud 2| to adjust the .feed roll toward and from the knife; and the feed roll shaft is connected by a telescoping shaft 23 and a universal joint with a driving pulley 25. The feed roll support I1 is connected by a link 2'! with a treadle controlled arm 29 pivoted at 3| to the base of the machine 25 and carrying a small block 33. Two small adjusting nuts 35 threaded on a small rod 31 limit the rocking movement of the arm 29 and hence the extent of angular adjustment of the feed roll support ll. The arm 29 is connected by a 30 link 3t] and a pivot 32 with the upper end of a treadle rod 39 in such manner that vertical movement of the rod swings the arm to the right or left. The lower end of the rod is connected to a treadle M normally held in raised position by a spring 10 to hold the feed roll II in its up position in which the uppermost element of its periphery is parallel to the plane of the knife or substantially so. With the parts in the positions shown in Figs. 2 and 3, a cer- 40 tain kind of scarf will be produced, and when the treadle 41 is depressed to swing the roll in a counterclockwise direction until the small block 33 encounters the right-hand stop 35, a different kind of scarf will be produced, the presser 41 .45 and edge guide it being automatically adjusted horizontally when the angular position of the feed roll is changed. A second treadle, 49, provides means for adjusting the presser and edge guide horizontally independently of the treadle M, to produce a third kind of scarf. The support ll, the block l5 and the various parts of the superstructure which are rigid with the block form an angularly adjustable carrier for the feed roll and for the presser and edge guide. The

machine as thus far described operates in general as does the patented machine, but the mounting of the presser and edge guide, the mechanism whereby angular adjustment of the feed roll adjusts the presser and guide horizontally and the connection from the treadle 49 to the guide are different. Moreover, the treadles are manipulated in a different manner to produce the desired scarfs.

The stem 45 of the edge guide 43, which carries the yieldingly mounted presser 41, is slidable in a path parallel to the axis of the feed roll in a dovetailed guideway, not shown, formed in a part of a bracket 5| which is rigid with the block l5. A gib along one Wall of this guideway is indicated at 53 (Fig. 2), and one of the screws for adjusting the gib transversely of the guideway is indicated at 55 (Fig. 1). A coiled compression spring 55 (Fig. 2), which bears with one end against one end of the stem 45 and with the other end against a part of the bracket 5| urges the edge guide at all times to move toward the feed disk. A flexible wire 51 provides means for moving the edge guide at any time to the right, said wire being fastened at one end in a socket in the stem 45 by a screw 59 and at the other end to the treadle 49, and being encased in a flexible conduit 6|. In order to limit the extent of possible movement of the edge guide to the right and left, two adjustable stops are provided in the form of screws 63, 65 which are threaded through split bosses on a plate 61 and are held in adjusted position by two pinch screws 69, 1|, the plate 61 being fastened to the bracket 5| by four screws 13. Driven into the stem 45 and extending through alined horizontal slots in the bracket 5| and the plate 61 is an abutment in the form of a pin 15 which extends out through the slots into the space between the stop screws 63, 85, said pin being capable of moving to the right or left into positions determined by the positions of the screws. The pin contacts at times with the right-hand stop screw 65 but not with the left-hand stop screw 63 since the upper end of a lever 11, pivoted about the stem of a screw 19 which is threaded into the bracket 5|, extends up between the pin 15 and the stop screw 63. If the upper end of the lever is free to swing to the left and the edge guide is moved to the left, the movement of the pin 15 will be arrested when the lever 11 encounters the stop screw 63. In the positions of parts shown, however, the upper end of the lever is not free to swing to the left but is being held to the right. It is so held by the action of a stationary cam 8| fastened to the guide member I8 by screws 83, said cam having an inclined face which is in engagement with the rounded head of a screw threaded up through the lower bent end of the lever 11 and held in adjusted position by a check nut 81.

When the work-engaging parts are in the positions shown in Figs. 1, 2 and 3, with the upper element of the roll substantially parallel to the plane of the knife 9 and the lever 11 holding the presser and edge guide somewhat to the right. against the force of the spring 55, the comparatively narrow shoulder scarf shown in Fig. 4 will be produced. If now the treadle 4| is depressed the feed roll I land the bracket 5| will be swung counterclockwise about the horizontal axis indicated by the point :1: (Figs. 3, 4) and the head of the screw 85 will ride down and off from the stationary cam 8|, whereupon the work-engaging parts will assume the positions shown in Fig. 5 with the upper element of the roll II at a considerable angle to the plane of the knife 9 and with the presser and edge guide at the extreme lefthand limit of their movement, as determined by the position of the stop screw 63. In this case the lever is free to swing, and its upper end is pushed against the stop screw 63 by the spring 55 acting through the pin 15. With the parts in these positions a seam scarf, as shown in Fig. 6, will be produced. If now the treadle 49 is depressed to pull the edge guide to its extreme righthand position as determined by the stop screw 65, a feather edge scarf which is wider than the shoulder scarf of Fig. 4 will be produced. If both treadles are now released, the roll carrier and its associated parts will swing clockwise, the head of the screw 85 will ride up the inclined face of the cam 8|, and the parts will again assume the positions shown in Fig. 3. It should be noted that when the feed roll swings from the position shown in Fig. 5 and that shown in Fig. 3, the lever 77 is swung clockwise a predetermined distance and pushes the edge guide to the right against the force of the spring 55, and that the extent of this swinging movement, and hence the horizontal position of the edge guide, when the roll is in the position shown in Fig. 3, may be varied by adjusting the screw 85 in the lever 11. With the parts in. the positions shown in Figs. 1, 2 and 3 the narrow shoulder scarf of Fig. 4 will be produced, as has been stated above. If now the treadle 49 is depressed a wider shoulder scarf will result. If with the treadle 49 still depressed the treadle 4| is depressed, a wide feather edge scarf will be produced; and if with the treadle 4| still depressed the treadle 49 is released, the seam scarf of Fig. 6 will be produced. It is thus possible to adjust the machine instantly so as to produce any one of the scarfs described above; and by adjusting the block |5 horizontally so as to change the location. of the axis :1; with respect to the roll, the forms of these scarfs may be somewhat changed.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

I. A skiving machine having, in combination, a knife member, a feed roll member, an edge guide movable longitudinally of the feed roll member to vary the width of the scarf produced, a carrier for one of said members angularly adjustable to vary the inclination of the scarf produced, and means for moving the edge guide, said means comprising a lever pivoted to the carrier and means responsive to angular movement of the carrier for swinging the lever about its pivot.

2. A skiving machine having, in combination, a

knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf produced, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including a lever pivoted on the carrier, and a member adapted, when the carrier is at one limit of its angular movement, to hold the lever in a given position and, when the carrier is at the other limit of its angular movement, to permit the lever to swing about its pivot.

3. A skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for sliding adjustment longitudinally of the roll to vary the width of the scarf produced, and means operated by angular adjustment of the carrier for sliding the edge guide along the carrier, said means including a lever pivoted on the carrier and adapted when swung about its pivot to adjust the edge guide, and a member adapted when the carrier is at one limit of its angular movement to hold the lever in a given position and when the carrier is at the other limit of its angular movement to permit the lever to swing about its pivot.

4. A skiving machine having, in combination, a knife, a feed r011, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including an abutment carried by the edge guide, two stops between which lies the path of movement of the abutment, a lever pivoted to the carrier, said lever extending into the path of movement of the abutment, and a stationary member adapted, when the carrier is adjusted angularly in one direction, to engage the lever and swing it about its pivot.

5. A skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including an abutment carried by the edge guide, two stops between which lies the path of movement of the abutment, a lever pivoted to the carrier, said lever extending into the path of movement of the abutment, and a stationary member adapted, when the carrier is adjusted angularly in one direction, to engage the lever and swing it about its pivot and, when the carrier is adjusted angularly in the opposite direction, to free the lever.

6. A'skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including a spring tending to move the edge guide in one direction, and a lever operated by angular adjustment of the carrier to move the edge guide in opposition to the spring.

7. A skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including a spring tending to move the edge guide in one direction, and a lever pivoted to the carrier and operated by angular adjustment of the carrier to move the edge guide in opposition to the spring.

8. A skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable into two positions to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide, said means being constructed and arranged to cause the production of a shoulder scarf upon adjustment of the carrier into one of its angular positions and to cause the production of a seam scarf upon adjustment of the carrier into its other angular position.

9. A skiving machine having, in combination, a knife, a feed roll, an edge guide, a carrier for the roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including a treadle manipulation of which adjusts the roll and edge guide either into positions to cause the production of a shoulder scarf or into positions to cause the production of a seam scarf, and a second treadle manipulation of which, when the roll and edge guide are in the last-named positions, adjusts the edge guide to cause the production of a feather edge scarf.

10. A skiving machine having, in combination, a knife, a feed disk, a feed roll, an edge guide, a carrier for the disk, roll and edge guide angularly adjustable to vary the inclination of the scarf produced, the edge guide being mounted on the carrier for adjustment longitudinally of the roll to vary the width of the scarf, and means operated by angular adjustment of the carrier for adjusting the edge guide with respect to the carrier, said means including a spring tending to move the edge guide toward the feed disk, a lever operated by angular adjustment of the carrier to move the edge guide a given distance away from the feed disk, and operator controlled means capable of being manipulated irrespective of the angular position of the carrier for moving the edge guide still farther away from the feed disk.

CHARLES C. BELL. 

